devlink: Expose port function commands to control IPsec packet offloads

Expose port function commands to enable / disable IPsec packet offloads,
this is used to control the port IPsec capabilities.

When IPsec packet is disabled for a function of the port (default),
function cannot offload IPsec packet operations (encapsulation and XFRM
policy offload). When enabled, IPsec packet operations can be offloaded
by the function of the port, which includes crypto operation
(Encrypt/Decrypt), IPsec encapsulation and XFRM state and policy
offload.

Example of a PCI VF port which supports IPsec packet offloads:

$ devlink port show pci/0000:06:00.0/1
    pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
        function:
        hw_addr 00:00:00:00:00:00 roce enable ipsec_packet disable

$ devlink port function set pci/0000:06:00.0/1 ipsec_packet enable

$ devlink port show pci/0000:06:00.0/1
    pci/0000:06:00.0/1: type eth netdev enp6s0pf0vf0 flavour pcivf pfnum 0 vfnum 0
        function:
        hw_addr 00:00:00:00:00:00 roce enable ipsec_packet enable

Signed-off-by: Dima Chumak <dchumak@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Link: https://lore.kernel.org/r/20230825062836.103744-3-saeed@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 52 insertions, 0 deletions

diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index fcc1a06cae48..149752bc9f2d 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -514,6 +514,28 @@ static int devlink_port_fn_ipsec_crypto_fill(struct devlink_port *devlink_port,
 	return 0;
 }
 
+static int devlink_port_fn_ipsec_packet_fill(struct devlink_port *devlink_port,
+					     struct nla_bitfield32 *caps,
+					     struct netlink_ext_ack *extack)
+{
+	bool is_enable;
+	int err;
+
+	if (!devlink_port->ops->port_fn_ipsec_packet_get ||
+	    devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF)
+		return 0;
+
+	err = devlink_port->ops->port_fn_ipsec_packet_get(devlink_port, &is_enable, extack);
+	if (err) {
+		if (err == -EOPNOTSUPP)
+			return 0;
+		return err;
+	}
+
+	devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_PACKET, is_enable);
+	return 0;
+}
+
 static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port,
 				     struct sk_buff *msg,
 				     struct netlink_ext_ack *extack,
@@ -534,6 +556,10 @@ static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port,
 	if (err)
 		return err;
 
+	err = devlink_port_fn_ipsec_packet_fill(devlink_port, &caps, extack);
+	if (err)
+		return err;
+
 	if (!caps.selector)
 		return 0;
 	err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value,
@@ -871,6 +897,13 @@ devlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable,
 	return devlink_port->ops->port_fn_ipsec_crypto_set(devlink_port, enable, extack);
 }
 
+static int
+devlink_port_fn_ipsec_packet_set(struct devlink_port *devlink_port, bool enable,
+				 struct netlink_ext_ack *extack)
+{
+	return devlink_port->ops->port_fn_ipsec_packet_set(devlink_port, enable, extack);
+}
+
 static int devlink_port_fn_caps_set(struct devlink_port *devlink_port,
 				    const struct nlattr *attr,
 				    struct netlink_ext_ack *extack)
@@ -902,6 +935,13 @@ static int devlink_port_fn_caps_set(struct devlink_port *devlink_port,
 		if (err)
 			return err;
 	}
+	if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
+		err = devlink_port_fn_ipsec_packet_set(devlink_port, caps_value &
+						       DEVLINK_PORT_FN_CAP_IPSEC_PACKET,
+						       extack);
+		if (err)
+			return err;
+	}
 	return 0;
 }
 
@@ -1278,6 +1318,18 @@ static int devlink_port_function_validate(struct devlink_port *devlink_port,
 				return -EOPNOTSUPP;
 			}
 		}
+		if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) {
+			if (!ops->port_fn_ipsec_packet_set) {
+				NL_SET_ERR_MSG_ATTR(extack, attr,
+						    "Port doesn't support ipsec_packet function attribute");
+				return -EOPNOTSUPP;
+			}
+			if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) {
+				NL_SET_ERR_MSG_ATTR(extack, attr,
+						    "ipsec_packet function attribute supported for VFs only");
+				return -EOPNOTSUPP;
+			}
+		}
 	}
 	return 0;
 }